2-238253316-C-G

Variant names:

• chr2-238253316-C-G
• rs35333999
• NM_022817.3:c.2707G>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_022817.3(PER2):​c.2707G>C​(p.Val903Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V903I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PER2 NM_022817.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.349

Genes affected

PER2 (HGNC:8846): (period circadian regulator 2) This gene is a member of the Period family of genes and is expressed in a circadian pattern in the suprachiasmatic nucleus, the primary circadian pacemaker in the mammalian brain. Genes in this family encode components of the circadian rhythms of locomotor activity, metabolism, and behavior. This gene is upregulated by CLOCK/ARNTL heterodimers but then represses this upregulation in a feedback loop using PER/CRY heterodimers to interact with CLOCK/ARNTL. Polymorphisms in this gene may increase the risk of getting certain cancers and have been linked to sleep disorders. [provided by RefSeq, Jan 2014]

ENSG00000225057 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.18682647).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PER2	NM_022817.3	c.2707G>C	p.Val903Leu	missense_variant	Exon 19 of 23	ENST00000254657.8	NP_073728.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PER2	ENST00000254657.8	c.2707G>C	p.Val903Leu	missense_variant	Exon 19 of 23	1	NM_022817.3	ENSP00000254657.3
PER2	ENST00000707129.1	c.2707G>C	p.Val903Leu	missense_variant	Exon 19 of 23			ENSP00000516757.1
PER2	ENST00000707130.1	c.2707G>C	p.Val903Leu	missense_variant	Exon 19 of 23			ENSP00000516758.1
ENSG00000225057	ENST00000456601.1	n.1525-872C>G		intron_variant	Intron 5 of 6	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	18
DANN	Uncertain	0.98
DEOGEN2	Benign	0.17	T
Eigen	Benign	-0.33
Eigen_PC	Benign	-0.51
FATHMM_MKL	Benign	0.12	N
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.0080	T
MetaRNN	Benign	0.19	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.3	M
PrimateAI	Uncertain	0.51	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.050
Sift	Benign	0.10	T
Sift4G	Benign	0.089	T
Polyphen		0.98	D
Vest4		0.15
MutPred		0.23		Loss of catalytic residue at V903 (P = 0.0057);
MVP		0.14
MPC		0.24
ClinPred		0.39	T
GERP RS		2.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.084
gMVP		0.33

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs35333999; hg19: chr2-239161957;